CN104124024A - Magnesium-based rare earth ferromagnetic core material - Google Patents
Magnesium-based rare earth ferromagnetic core material Download PDFInfo
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- CN104124024A CN104124024A CN201410287857.6A CN201410287857A CN104124024A CN 104124024 A CN104124024 A CN 104124024A CN 201410287857 A CN201410287857 A CN 201410287857A CN 104124024 A CN104124024 A CN 104124024A
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Abstract
The invention discloses a magnesium-based rare earth ferromagnetic core material which comprises main materials and addictives. The main materials comprise, by molar ratios, 70-75.5 moles of Fe3O4, 12-17.5 moles of manganese oxide, 14-19.4 moles of zinc oxide, 1.2-3 moles of titanium dioxide and 0.4-1 mole of tungsten. The addictives comprise the following ingredients according to weight ratios of the addictives in the ferromagnetic core material: 30-40 ppm of thorium oxide, 40-50 ppm of zinc oxide, 100-200 ppm of niobium boride and 700-1000 ppm of magnesium-based rare earth composite magnetic conduction powder. Magnetic energy product of the rare earth composite magnetic conduction powder added into the ferromagnetic core material is high, magnetism is stable, mechanical performance of the ferromagnetic core material can be obviously improved, and porosity is reduced.
Description
Technical field
The present invention relates generally to oxidate magnetic material and manufactures field, relates in particular to a kind of magnesium base Rare-earth Iron core material.
Background technology
Along with the communication technology and the digitized development of electronic product; soft magnetic ferrite and element have been proposed to new requirement; high-performance high magnetic permeability magnetic core is widely used in each type telecommunications and information stock, as the fields such as common-mode filter, pulsactor, current transformer, earth leakage protective device, insulating transformer, signal and pulse transformer are widely applied.Telecommunications industry needs FERRITE CORE to have low core loss and high magnetic permeability now, and to meet microminiaturization and the high efficiency requirement of present electric equipment, existing magnetic core is difficult to meet above-mentioned requirements;
Its magnetic energy product of the permanent magnetic material that rare earth makes can reach 150 times of carbon steel, 3～5 times of magnalium magnesium permanent magnetic material, 8～10 times of permanent-magnet ferrite, and temperature coefficient is low, magnetic stability, coercive force is up to 800 kilo-ampere/rice.Be mainly used in the magnetic system of low speed torque motor, actuating motor, transducer, magnetic bearing etc.Nd-Fe-Bo permanent magnet material is third generation rare earth permanent-magnetic material, and its remanent magnetism, coercive force and maximum magnetic energy product are higher than the former, non-friable, has good mechanical performance, and alloy density is low, is conducive to lightness, slimming, the small-sized and subminaturization of magnetic element.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, and a kind of magnesium base Rare-earth Iron core material is provided.
The present invention is achieved by the following technical solutions:
A kind of magnesium base Rare-earth Iron core material, it comprises major ingredient and additive, and described major ingredient comprises according to mol ratio: the zinc oxide of the Fe3O4 of 70-75.5 mol, the manganese oxide of 12-17.5 mol, 14-19.4 mol, the titanium dioxide of 1.2-3 mol, 0.4-1mol tungsten; Additive comprises according to the weight ratio meter that accounts for described ferromagnetic core material: the niobium (Nb) boride of the thorium oxide of 30-40ppm, the zinc oxide of 40-50ppm, 100-200ppm, the magnesium base rare earth compounded magnetic conductive powder of 700-1000ppm;
The preparation of described magnesium base rare earth compounded magnetic conductive powder comprises the following steps:
(1) preparation of magnesium colloidal sol:
Polyacrylamide, guar gum are mixed to join in deionized water, stir, obtain liquid a;
Magnesium oxide is mixed with nano-carbon powder, calcines 20-30 minute at 800-1000 DEG C, cooling ball milling, to fineness be 50-100 μ m, join in above-mentioned liquid a 500-600 rev/min of dispersed with stirring 10-14 minute;
(2) polyvinylpyrrolidone is joined in lanthanum chloride solution, at 60-80 DEG C, be uniformly mixed 10-20 minute, add ammonium bicarbonate aqueous solution, insulation 3-5h, adds above-mentioned magnesium colloidal sol, is stirred to normal temperature, centrifugal dehydration, 200 DEG C of dry 30-40 minute of 100-, calcine 6-10 hour at 700-1000 DEG C, obtain described rare earth compounded magnetic conductive powder.
The concentration of described lanthanum chloride solution is 0.8-2mol/L; The concentration of ammonium bicarbonate aqueous solution is that 20-30%, consumption are the 30-40% of lanthanum chloride solution weight;
Described polyvinylpyrrolidone and the mol ratio of lanthanum chloride are 1-2:1;
Described magnesium oxide and the mass ratio of lanthanum chloride are 40-60:1;
The mass ratio of described polyacrylamide, guar gum, magnesium oxide, nano-carbon powder, water is 2-3:2-3:80-100:10-20:300-500.
A preparation method for magnesium base Rare-earth Iron core material, comprises the following steps:
(1) above-mentioned major ingredient is sent into blending tank, 2500-3000 rev/min is stirred mixed 2-4 hour, sends into rotary furnace pre-burning, control 400 DEG C of temperature 300-, the pre-burning time is 2-4 hour, sends into grinding pot, adopt the alcohol water blend that abrasive media is 15-20%, being ground to fineness is 40-100 μ m;
(2) additive is sent into grinding pot, adopt the alcohol water blend that abrasive media is 15-20%, be wherein added with and be equivalent to the dipotassium tetraborate of weight of additive 0.8-1%, the magnesium salicylate of 1-2%, being ground to fineness is 40-50 μ m;
(3) above-mentioned each raw material after treatment is mixed, spraying is dry, is pressed into base, and sintering, obtains described magnesium base Rare-earth Iron core material.
Advantage of the present invention is:
Magnesium base rare earth compounded magnetic conductive powder good weatherability, magnetic energy product that ferromagnetic core material of the present invention adds are high, and magnetic stability can obviously improve the mechanical performance of ferromagnetic core material, reduces the porosity.
Embodiment
Embodiment 1
A kind of magnesium base Rare-earth Iron core material, is characterized in that it comprises major ingredient and additive, and described major ingredient comprises according to mol ratio: the zinc oxide of the Fe3O4 of 75.5 mol, the manganese oxide of 17.5 mol, 19.4 mol, the titanium dioxide of 1.2 mol, 0.4mol tungsten; Additive comprises according to the weight ratio meter that accounts for described ferromagnetic core material: the niobium (Nb) boride of the thorium oxide of 40ppm, the zinc oxide of 50ppm, 200ppm, the magnesium base rare earth compounded magnetic conductive powder of 1000ppm;
The preparation of described magnesium base rare earth compounded magnetic conductive powder comprises the following steps:
(1) preparation of magnesium colloidal sol:
Polyacrylamide, guar gum are mixed to join in deionized water, stir, obtain liquid a;
Magnesium oxide is mixed with nano-carbon powder, calcines 30 minutes at 1000 DEG C, cooling ball milling, to fineness be 100 μ m, join in above-mentioned liquid a 600 revs/min of dispersed with stirring 14 minutes;
(2) polyvinylpyrrolidone is joined in lanthanum chloride solution, at 80 DEG C, be uniformly mixed 20 minutes, add ammonium bicarbonate aqueous solution, insulation 5h, adds above-mentioned magnesium colloidal sol, is stirred to normal temperature, centrifugal dehydration, 100 DEG C dry 40 minutes, calcine 10 hours at 500 DEG C, obtain described rare earth compounded magnetic conductive powder.
The concentration of described lanthanum chloride solution is 0.8mol/L; The concentration of ammonium bicarbonate aqueous solution is 30%, consumption is 40% of lanthanum chloride solution weight;
Described polyvinylpyrrolidone and the mol ratio of lanthanum chloride are 1:1;
Described magnesium oxide and the mass ratio of lanthanum chloride are 60:1;
The mass ratio of described polyacrylamide, guar gum, magnesium oxide, nano-carbon powder, water is 2:3:100:20:300.
A preparation method for magnesium base Rare-earth Iron core material, comprises the following steps:
(1) above-mentioned major ingredient is sent into blending tank, 3000 revs/min are stirred mixed 2 hours, send into rotary furnace pre-burning, control 400 DEG C of temperature, and the pre-burning time is 4 hours, sends into grinding pot, adopts the alcohol water blend that abrasive media is 20%, and being ground to fineness is 100 μ m;
(2) additive is sent into grinding pot, adopt the alcohol water blend that abrasive media is 20%, be wherein added with and be equivalent to the dipotassium tetraborate of weight of additive 0.8%, 1% magnesium salicylate, being ground to fineness is 50 μ m;
(3) above-mentioned each raw material after treatment is mixed, spraying is dry, is pressed into base, and sintering, obtains described magnesium base Rare-earth Iron core material.
Through detection, the basic mechanical design feature index that the product of above-described embodiment 1 gained reaches:
The saturation induction density of magnetic core of the present invention can reach 15000 Gausses, and saturation flux rate density is 475mT, and Curie temperature is higher than 240 DEG C, resistivity 6.4 Ω .m.
Claims (2)
1. a magnesium base Rare-earth Iron core material, it is characterized in that it comprises major ingredient and additive, described major ingredient comprises according to mol ratio: the zinc oxide of the Fe3O4 of 70-75.5 mol, the manganese oxide of 12-17.5 mol, 14-19.4 mol, the titanium dioxide of 1.2-3 mol, 0.4-1mol tungsten; Additive comprises according to the weight ratio meter that accounts for described ferromagnetic core material: the niobium (Nb) boride of the thorium oxide of 30-40ppm, the zinc oxide of 40-50ppm, 100-200ppm, the magnesium base rare earth compounded magnetic conductive powder of 700-1000ppm;
The preparation of described magnesium base rare earth compounded magnetic conductive powder comprises the following steps:
(1) preparation of magnesium colloidal sol:
Polyacrylamide, guar gum are mixed to join in deionized water, stir, obtain liquid a;
Magnesium oxide is mixed with nano-carbon powder, calcines 20-30 minute at 800-1000 DEG C, cooling ball milling, to fineness be 50-100 μ m, join in above-mentioned liquid a 500-600 rev/min of dispersed with stirring 10-14 minute;
(2) polyvinylpyrrolidone is joined in lanthanum chloride solution, at 60-80 DEG C, be uniformly mixed 10-20 minute, add ammonium bicarbonate aqueous solution, insulation 3-5h, adds above-mentioned magnesium colloidal sol, is stirred to normal temperature, centrifugal dehydration, 200 DEG C of dry 30-40 minute of 100-, calcine 6-10 hour at 700-1000 DEG C, obtain described rare earth compounded magnetic conductive powder;
The concentration of described lanthanum chloride solution is 0.8-2mol/L; The concentration of ammonium bicarbonate aqueous solution is that 20-30%, consumption are the 30-40% of lanthanum chloride solution weight;
Described polyvinylpyrrolidone and the mol ratio of lanthanum chloride are 1-2:1;
Described magnesium oxide and the mass ratio of lanthanum chloride are 40-60:1;
The mass ratio of described polyacrylamide, guar gum, magnesium oxide, nano-carbon powder, deionized water is 2-3:2-3:80-100:10-20:300-500.
2. a preparation method for magnesium base Rare-earth Iron core material as claimed in claim 1, is characterized in that comprising the following steps:
(1) above-mentioned major ingredient is sent into blending tank, 2500-3000 rev/min is stirred mixed 2-4 hour, sends into rotary furnace pre-burning, control 400 DEG C of temperature 300-, the pre-burning time is 2-4 hour, sends into grinding pot, adopt the alcohol water blend that abrasive media is 15-20%, being ground to fineness is 60-100 μ m;
(2) additive is sent into grinding pot, adopt the alcohol water blend that abrasive media is 15-20%, be wherein added with and be equivalent to the ammonium molybdate of weight of additive 0.5-1%, the trimethylolpropane of 1-2%, being ground to fineness is 40-50 μ m;
(3) above-mentioned each raw material after treatment is mixed, spraying is dry, is pressed into base, and sintering, obtains described magnesium base Rare-earth Iron core material.
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| CN201410287857.6A CN104124024A (en) | 2014-06-25 | 2014-06-25 | Magnesium-based rare earth ferromagnetic core material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252015A (en) * | 2016-08-17 | 2016-12-21 | 安徽德信电气有限公司 | A kind of various coil ferrite core material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844914A (en) * | 2010-05-11 | 2010-09-29 | 武汉吉磁电子科技有限责任公司 | Magnetoplumbate-type permanent magnetic ferrite and manufacturing method thereof |
| CN102390986A (en) * | 2011-08-09 | 2012-03-28 | 临沂中瑞电子有限公司 | Low-power-consumption MnZn ferrite material |
| JP2012096939A (en) * | 2010-10-29 | 2012-05-24 | Tdk Corp | Ferrite composition, ferrite core, and electronic component |
| CN102976741A (en) * | 2012-11-23 | 2013-03-20 | 天长市昭田磁电科技有限公司 | Preparation method of manganese zinc MnZn soft magnetic ferrite material containing modified nanocarbon |
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2014
- 2014-06-25 CN CN201410287857.6A patent/CN104124024A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844914A (en) * | 2010-05-11 | 2010-09-29 | 武汉吉磁电子科技有限责任公司 | Magnetoplumbate-type permanent magnetic ferrite and manufacturing method thereof |
| JP2012096939A (en) * | 2010-10-29 | 2012-05-24 | Tdk Corp | Ferrite composition, ferrite core, and electronic component |
| CN102390986A (en) * | 2011-08-09 | 2012-03-28 | 临沂中瑞电子有限公司 | Low-power-consumption MnZn ferrite material |
| CN102976741A (en) * | 2012-11-23 | 2013-03-20 | 天长市昭田磁电科技有限公司 | Preparation method of manganese zinc MnZn soft magnetic ferrite material containing modified nanocarbon |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252015A (en) * | 2016-08-17 | 2016-12-21 | 安徽德信电气有限公司 | A kind of various coil ferrite core material |
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